CVE-2024-26736: afs: Increase buffer size in afs_update_volume_status()

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.7% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-04-03 · updated 2026-08-04
Weakness: CWE-787

Description

In the Linux kernel, the following vulnerability has been resolved: afs: Increase buffer size in afs_update_volume_status() The max length of volume->vid value is 20 characters. So increase idbuf[] size up to 24 to avoid overflow. Found by Linux Verification Center (linuxtesting.org) with SVACE. [DH: Actually, it's 20 + NUL, so increase it to 24 and use snprintf()]

Affected products

Debian Linux: 10.0
Linux kernel: from 4.15 before 5.4.270; from 5.5 before 5.10.211; from 5.11 before 5.15.150; from 5.16 before 6.1.80; from 6.2 before 6.6.19; from 6.7 before 6.7.7 — fixed in 5.10.211, 5.15.150, 5.4.270, 6.1.80, 6.6.19, 6.7.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.211, 5.15.150, 5.4.270, 6.1.80. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2024-26736 or the next vulnerability affects your stack